These classifications refer to the following aspects:

*GROUP I: Electrical Installations
**SUBGROUP I-07E: Telecommunications and Radioelectric Installations (highest category of this subgroup).
**SUBGROUP I-09E: Electrical Installations without specific qualification.

Furthermore, these classifications are valid indefinitely, as stipulated in section 1 of article 59 of Law 30/2007, of October 30, on Public Sector Contracts.

Obtaining this classification is part of the company's ongoing expansion strategy.